Connectivity between iOS devices and Universal Serial Bus (USB) accessories enables data transfer, charging, and enhanced functionality. For instance, using a Lightning to USB adapter, an iPhone can be connected to a MIDI keyboard for music creation or to a USB microphone for higher-quality audio recording.
This capability expands the utility of iOS devices, moving beyond standard operation. It facilitates professional workflows by allowing connection to specialized hardware, simplifies data management through direct access to storage devices, and supports a wide range of accessories that enhance the user experience. Early versions of iOS had limited USB support, but subsequent updates have broadened compatibility.